MKS Instruments (NASDAQ:MKSI) reported quarterly earnings of $1.72 per share which beat the analyst consensus estimate of $1.45 by 18.62 percent. The company reported quarterly sales of $896.000 million which beat the analyst consensus estimate of $874.257 million by 2.49 percent. This is a 3.86 percent decrease over sales of $932.000 million the same period last year.